Bitcoin is the father of crypto from the many altcoins that follow. some people don't think that bitcoin itself is feasible and reliable, where as many altcoins appear bitcoin will still be used as a base value
I think it is everybodys personal thoughts and opinions what he wants to do. Nobody will take his decisions on someones advice. I think everybody should search the market itself and decide what to do. If you want to earn money you will have to stay here in crypto, otherwise if you sell your coins you will lose a chance of making money in the future.